Pug mill is used for _____.

A. Brick drying

B. Clay moulding

C. Clay preparation

D. Brick burning

Answer: Option C – Clay preparation


Manufacturing process of bricks involves: 

1. Preparation of clay for brick manufacturing
Preparation of clay for bricks manufacturing is done in six steps:
i) Unsoiling of clay
ii) Digging
iii) Cleaning
iv) Weathering
v) Blending
vi) Tempering
In the Tempering stage, water is added to clay and pressed or mixed. The pressing will be done by cattle or with feet of men for small scale projects, pug mill is used as grinder for large scale projects. So, the clay obtains the plastic nature and now it is suitable for molding.

2. Molding of clay for brick manufacturing
- Hand molding of bricks
- Machine molding of bricks

3. Drying of raw bricks

4. Burning of bricks

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